碳量子点
材料科学
量子点
光催化
异质结
可见光谱
纳米线
纳米颗粒
纳米技术
光电子学
催化作用
化学
生物化学
作者
Zhiwei Chen,Chang Feng,Weibing Li,Zhiyong Sun,Jian Hou,Xiangbo Li,Likun Xu,Mingxian Sun,Yuyu Bu
出处
期刊:Chinese Journal of Catalysis
[China Science Publishing & Media Ltd.]
日期:2018-04-01
卷期号:39 (4): 841-848
被引量:40
标识
DOI:10.1016/s1872-2067(17)62972-3
摘要
Zero-dimensional carbon dots (0D C-dots) and one-dimensional sulfide cadmium nanowires (1D CdS NWs) were prepared by microwave and solvothermal methods, respectively. A series of heterogeneous photocatalysts that consisted of 1D CdS NWs that were modified with 0D C-dots (C-dots/CdS NWs) were synthesized using chemical deposition methods. The mass fraction of C-dots to CdS NWs in these photocatalysts was varied. The photocatalysts were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible spectroscopy. Their photocatalytic performance for the spitting of water and the degradation of rhodamine B (RhB) under visible light irradiation were investigated. The photocatalytic performance of the C-dots/CdS NWs was enhanced when compared with that of the pure CdS NWs, with the 0.4% C-dots/CdS NWs exhibiting the highest photocatalytic activity for the splitting of water and the degradation of RhB. The enhanced photocatalytic activity was attributed to a higher carrier density because of the heterojunction between the C-dots and CdS NWs. This heterojunction improved the electronic transmission capacity and promoted efficient separation of photogenerated electrons and holes. 0D/1D heterojunction of C-dots/CdS NWs was prepared to investigate the enhanced photocatalytic performance under visible light irradiation. The heterojunction establishment can effectively improve the electronic transmission capacity, and promote the separation efficiency of photogenerated carriers of C-dots/CdS NWs.
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